Echoing command results


 
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# 1  
Old 10-25-2012
Echoing command results

Sorry folks, Second time today.

I am working on a script that accepts data via pipe and processes it.
I expect it to work as:
Code:
# command | ProcScript.sh

Within ProcScript.sh, I want to be able to give the target of the prev run command

I am using history 2 | grep -v history | awk '{print $3}', which works off the command line:
Code:
   > cat ios.cfg | ConfProc.sh
   > history 2 | grep -v history | awk '{print $3}'
   ios.cfg
   >

But when I run it in my script, I get errors as follows:
in the script:
Code:
echo (`history 2 | grep -v history | awk '{print $3}'`)

Error:
Code:
/ConfProc.sh: line 15: syntax error near unexpected token ``history 2 | grep -v history | awk '{print $3}'`
/ConfProc.sh: line 15: `echo (`history 2 | grep -v history | awk '{print $3}'`)

What am I doing wrong?

Thanks!
# 2  
Old 10-25-2012
Try without using the open and close brackets....Smilie
# 3  
Old 10-25-2012
try:
Code:
echo `history 2 | grep -v history | awk '{print $3}'`

# 4  
Old 10-25-2012
Or the new style:

Code:
echo $(history 2 | grep -v history | awk '{print $3}')

# 5  
Old 10-25-2012
Quote:
Originally Posted by msabhi
Try without using the open and close brackets....Smilie
you mean in the awk?

I am using parenthesis around the entire command. Should they be brackets?

If not, I did try without the para's but still had the brackets in the awk

Marc

---------- Post updated at 02:28 PM ---------- Previous update was at 02:26 PM ----------

Quote:
Originally Posted by in2nix4life
Or the new style:

Code:
echo $(history 2 | grep -v history | awk '{print $3}')

This just gets me an empty answer:
Code:
> cat ios.cfg | ConfProc.sh


You have ended the program
Good bye

---------- Post updated at 02:30 PM ---------- Previous update was at 02:28 PM ----------

Quote:
Originally Posted by rdrtx1
try:
Code:
echo `history 2 | grep -v history | awk '{print $3}'`


Same with the other suggestion,
I just get:
Code:
> cat ios.cfg | ConfProc.sh


You have ended the program
Good bye

# 6  
Old 10-25-2012
No just like what rdrtx1 has mentioned...
Quote:
Originally Posted by msabhi
Try without using the open and close brackets....Smilie
# 7  
Old 10-25-2012
Just run the line like this in your shell script:
Code:
history 2 | grep -v history | awk '{print $3}'

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